Electromagnet controlling device.



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H. K. KOUYOUMJIAN.

ELEGTROMAGNET GONTROLLING DEVICE. APPLICATION FILED 11111.18; 1911.

1,042,691, I Patented 001.2111912.

. 6 f lllA l I -8 f i "u Il v Mr/vsssss lTQ skill.c'bzom tilt may concern;v

- inentjnin'Electromagnet Controlling Devices, of which thev fol'lowing-isfa' full', clear, and

UNITED AsrArns Pnfrnivr ormoni .HARpUTIUN xxouromvwmmor sr. Louis, Missounr.:

.ELEcfrnoM-AGNET coN'rnoLLINe DEVICE.'

timown that. .1, HAROUTIU'N K. KQU- 1a. citizen ofthe United States,

vented .al .certain-new ,andi useful Improveeiractde riptio'n',`j "suchl as will enable others p islrilledlin e i-rt ,5to-which it zappertains to make and thefs'vanieg-reference being had o theacc() panying'7-'drawings,' forming t-- f th' "'fi' ati" n-,- in1which-- ign e" evati'onal viewjpartly g-ili'hown @yimp ovementasfappliedto a clothes ypressing 'in:ichine, in'which thereis'an iron capable. of being- Subj ected tol variable pressure, .but

tjis'gobvious'that in lieu .of an'iron, a cutting 'y .-'die' c o uld .be-emplo'yed,` andf it. is equally obviousthat the im roved form of electro- -inagnet1controlling evice illustrated vin the `dr.avv-ings could` be .used in connection with .n other and very diii'erenttypes of machines. ,.1. The objectl of my present'invention is'to "construct a controlling device. actuated' by electricity invsucha mannerv that after the .controlling device has'performed 'its' func-A tion, it may be rendered ineffective almost. 4'immediately to allowthe tool lor other devicev actuated b ther controlling means t be loperated in ependent-ly of the electro-pv l vertical pivot in the upper end of the lever` @The present application is' a division of my 'application main lever 3 on a shaft 4.-

v 5 is an arm swingin'gly mounted upona 3,said lever carrying a telescopingmember 6, on'. the outerendhof which 1s positionedk an iron die or tool 7;

A8 is the 'work table' onvwhich .material` to be acted upon is placed.v

. The lower end of thelever 3 extends for! wardly and carries an `armatured-isk 9' in Specication of Letters Patent. 1910, Serial No. 540,820. Divided and this application filed January 1s, ,11911. serial No.' 503,388.

y p roved'device as applied d diagrammatic view of lates `and useful electromagnet control-V led January 29 1910,v Serial N0..54o,82o.. y ,Y f

rame having standards Patented 001329.19112.

sistance coil a.

which is arranged a magnetically high rel1"v is an electromagnet secured in position wit-hin the frame 1 and having a coil b thereon of comparatively ylow resistance. When the magnet 11 is energized through a' current passing through the coilv Ait attracts the 'armature 9 and operates the main4 lever 3.

.12 is a bracket extension ont-he forwardly entendi'ng main lever 3, saidbracket extern. sion having a foot lever 1,3 mounted at its lower end, the forward end of which. foot lever. is providedwith a treadle on which theoperator may lace his foot. An adjustable rubber butlerv 14 .limits the 'upward movement of 'the foot lever. A link 15 is connected to the rear e'nd of the foot lever l'weight 16 coperates with the weight 19 the formy of,A a box containing shot, and asslsts incounter-balancmg the mam lever under weight 16 and 1provided with a rub'- ber buffer'ring 20. eight 19 is pivotally 'supported upon the-shaft 18 .and vprovided "with an extension in which is mounted a roller 21, which roller bears upon the rear .face of the bracket 12. Theweight 19 tends tok move the roller 21 in the direction of the arrow against the bracket12, and this movement elevates the foot of the main lever and tends to raise the tool 7. When the operator de resses the forward end of the leverl l13, 'the y rst action is to swing the main lever 3 and the bracket 12 rearwardly, thus raisinggthe weightsl and 19. Further pressure `of the vfoot lever 15 causes the weight 16 to [elevate which movement actuates the rheostat and, cuts in the'urrent.y The tool end of the main lever with weight 16 removed overbalances the weight 19. When the operator removes his foot from the le ver 13 and permits the weight 16 to descend, it will enga e weight 19, and the combined weights 1 and 19 will overbalance the tool .end of they main lever and raise said end.

Weight. l19 is preferably .immediately ico 'tact points 24a-and 25.

lVhen the operation-raises weight 16 to per mit the tookv end of the main lever to descend, lever 17 causes the shaft -18 to which it is fixed toroclnand a rod E22 on said shaft has its forward end depressed.

Mounted upon the frame 1 is a rheostat 23 provided with oppositely arranged conl Pivotally mounted on the exterior or the rheostat is a contact arm 26 adapted to engage With the contact points 24 and'l at either end. Connected in any suitable manner to the contact arm 26 is a rod 27 passing downvthrough an opening in the rod 22 and having a Weight 2S attached thereto in contact-with the rod 22. A weight. 29 is attached to the contact arm E2G on the opposite side ofthe pivot point from the connection of the rod 2T to said arm.- The parts 26 and-27 are arranged to allow of a slight lost motion therebetween.

Pivoted at 30 on the frame 1 is an adjusts able stop arm 31, having one end 32 adapted to be positioned in the path of movement ot one end of the contact arm 26. The opposite end 33 of the arm 31 is provided with an end piece and milled nut 34 connected with the arm through a curved slot 35 in the frame 1.

The extent of movement of the rheostat 'or contact arm 2G is directly lunder control of the operator through the footvlever 13, so that theloperator can apply as little or as much pressure on the tool 7 as desired. The weight 99 will return the rheostat'or contact arm so as to cut in resistance when the forward end of the toot lever is raised. The weight 29 is, of course, overbalanced by the weight QS when the'foot lever is depressed.

rl`he stop arm or lever 31 may be adjusted to any desired position by clamping the milled nut 34 so as to determine the amount of movement of-the rhcostat or contact arm E2G as the end of the arm adjacent said stop lever moves downward. By this means the maximum limit of pressure may be predetermined. suliicicntly powerful to exert four thousand pounds pressure on the tool 7, and it is desired to exert not more than two thousand pounds pressure on said tool, thenthc lever 31 can be adjusted in the proper position to arr-est the rheostat or contact arm when sufficient resistance is cut out of the circuit to energize. the magnet 11 to the proper amount. Thus, it is not necessary for the operator to hold the foot lever 13 stationary to maintain two thousand pounds pressure on the tool 7. The foot lever may be depressed the full limit, `but movement of the rhcostat or contact arm 26 will be stopped by engagement with the lever 21, which permits the magnet 1 1 to be energizedlonly by the necessary amount of current to give the desired pressure. The magnet 11 becomes For instance, yif magnet 11 isl this .saturation so that the magnet 11 will release instantly, I arrange a high resist ance coil a in the armature 9, which, when energized, repels the core ot the magnet 11 and not only neutralizes the magnetic saturation referred to, but by such repulsion assists in separating the armature and the magnetic core. To accelerate this release ot' the armature, the jar or impact of the weight 16 on the weight 19 is utilized, and when such jar or impact takes place, the armature 9 will be suddenly moved or kicked ott the magnet -11. v

In F ig. 2 is shown the electric circuit connecting the line with the' rheostatand the coils on the electromagnet and armature. By this figure it is seen that as the rheostat resistance is cut down, the current flowing through the coil l) is increased and that through coil a is decreased. Likewise, as the rheostat resistance is increased, the current iowingthrough coil Z) is decreased and that through coil a is increased.. There is an ordinary hand switch c in this circuit, whose purpose is well understood.

The weight 19 is resisted in its upward movement when the tool 7 contacts with the material to be operated upon, and the .continued movement of the weight 1G in an upward direction causes the rheostat or contact arm to operate so that the operator has control .of this arm independently of any move ment` ot the main lever. lllhen the operator raises his toot to release the foot lever, the first action is to cause the weight 1G to strike the weight 19, whereby a jar is imparted to the armature 9, causing the magnet 11 to lose its magnetic saturation, and provides iior a quick separation'of the armature and magnet. A

I prefer to have the number of turns in the high resistance coil a equal to the number of turns of the main winding L of the 'main magnet, so that, when Athe two magnets are in series,rwhich will occur when all ot the resistance of the rheostat is eut into the magnet circuit, the repclling action of the high resistance ,magnet is equal to the attraction ot' the main magnet, and hence the two forces, one pulling and the other pushing, are practically neutralized and the parts are held in a position of equilibrium. Thenever the rheostat armis moved to cut down the rheostatic resistance, it is obvious that .the current choked back from the high resistance coil a will pass through the coil b,

will preponderate, and the opposing magnet, herein described as the armature, will be attracted and thelnain lever overbalance under this slight pressure. As more rheostatic resistance is cut out, the preponderating inliuence in coil Will correspondingly so that its attraction to the opposing magnet increase, until finally, the absence of rheostatic resistance will cause practically all of the current to pass through the coil b, the self-resistance of coil a preventing the passage of any current therethrough. As the rheostatic resistance is cut in, the preponderating influence of coil. b is correspondingly decreased, until substantially all of the currentl is forced throughl the high resistance coil c now in series with the coil b, when the repelling and attraction forces before described will equalize each other. In this manner, the armature 9, in eii'ect, becomes a magnetofthe repelling force when in series with the main magnet and the extent of this magnetic repulsion is decreased; Thesaid armature becomes increasin ly susceptible to f the attracting influence of t e main magnet.

I claim:

l. Inv a. device of the character described, the combination of a lever having anarmature attached, an electro-magnet coperating with said lever, and weightsacting in combined sequence upon said lever to cause a quick separation of the armature and magnet when the current in the magnet is cut down.

Q. In a device of the character described, the cfmbination of a lever having an armature attached, an electro-magnet coperating with said armature, means actin upon said lever to control the position t ereof and simultaneously to regulate independent of the position of Isaid lever the current passing through the electro-magnet.

3. In a device of the character described, the combination of a lever having an arma-v ture attached, an electro-magnet coperating with said armature, a rheostat in circuit with said electro-magnet constituting means for controlling the position of the' lever, and means operating upon .the rheostat -independently of the lever to control the current through the electro-magnet.

4. In a device of the character described, the combination of a magnet having a coil wound thereon, an armature having a coil wound thereon, and a rheostat placed in series with the coil 011 the magnet and in parallel with the coil on the armature.

5. In a device of the character described,

-the combination of a lever having an armature attached, an electro-magnet coperating with said lever, a counterbalancing yweight acting upon said lever at all times,

means for controlling the fiow of current to said electro-magnet, and a second weight operatively connected with certain of said current-controlling means and adapted to cooperate with said first-mentioned weight to cause a quick separation of the armature and magnet When the current in the magnet is cut down.

.7. In a device of the" character described, the combination of a. lever, electro-magnetic means for operating said lever, means for controllin said electro-magnetic means, a counterbal normally cooperating with said counterbalancing weight, said secondary weight being rendered ineffective when said controlling means is operated. Y

8. In a device of the class described, a pivoted lever, an armature carried by lsaid lever and including an electro-magnet, a

ncing weight normally coperating with said lever, and a secondary weight principal electro-magnet coperating with said armature, mechanically operable means coperating with said lever to control the position of the armature, and means for simultaneously operating said mechanically operable means and regulating the current in the electro-magnet and the armature.

In testimony whereof I hereunto ailix my signature in the presence of two witnesses, this thirty first day of December, 1910.

HAROUTIUN K. KOUYOUMJ IAN.

Witnesses:

ROBERT WILLIAMS, GEO. F. PoU'rIUs.'

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner ot Patents,

' Washington, D. C. i 

